The Book of Bulgarian Sailors, Married Couple Yulia and Doncho Papazov, is a fascinating description of the full dangers of crossing a conventional lifeboat across the Pacific Ocean. The new expedition of brave researchers who sailed across the Atlantic Ocean in 1974 is a continuation of a series of experiments on the Plankton and Intercosmos programs, the main purpose of which is to test the endurance of the human body in extreme conditions, to test how much plankton can be used as food by shipwrecked, to establish the degree of pollution of the World Ocean. The book is based on the diary entries of the authors made directly during the trip.